US 12,235,023 B2
Method for controlling refrigerator
Seokjun Yun, Seoul (KR); Hyoungkeun Lim, Seoul (KR); Junghun Lee, Seoul (KR); and Hoyoun Lee, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/433,403
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Feb. 13, 2020, PCT No. PCT/KR2020/002075
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2020/175829, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 10-2019-0024264 (KR), filed on Feb. 28, 2019.
Prior Publication US 2022/0214083 A1, Jul. 7, 2022
Int. Cl. F25B 21/02 (2006.01); F25D 11/02 (2006.01); F25D 17/06 (2006.01); F25D 29/00 (2006.01)
CPC F25B 21/02 (2013.01) [F25D 11/02 (2013.01); F25D 17/065 (2013.01); F25D 29/00 (2013.01); F25B 2321/0211 (2013.01); F25B 2321/0212 (2013.01); F25B 2347/02 (2013.01); F25D 2700/122 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A refrigerator, comprising:
a refrigerating compartment;
a freezing compartment partitioned from the refrigerating compartment;
a deep freezing compartment accommodated in the freezing compartment and partitioned from the freezing compartment;
a thermoelectric module to cool the deep freezing compartment to a temperature lower than that of the freezing compartment;
a temperature sensor to detect a temperature of the deep freezing compartment;
a deep freezing compartment fan to cause an internal air of the deep freezing compartment to forcibly flow; and
a controller configured to control driving of the thermoelectric module and the deep freezing compartment fan, wherein the controller is configured to apply any one of a low voltage, a medium voltage, a high voltage, and a reverse voltage to the thermoelectric module according to an operation mode of the refrigerator, and is configured to operate the deep freezing compartment fan at any one of low speed, medium speed, and high speed,
wherein, a deep freezing compartment mode being in an on state,
in response to the temperature of the deep freezing compartment being in a satisfactory temperature region, the controller is configured to apply the low voltage to the thermoelectric module, and
in response to the deep freezing compartment temperature being out of the satisfactory temperature region, the controller is configured to apply the medium voltage to the thermoelectric module.